3 March 2006 A scaleable optical interconnect for low-latency cell switching in high-performance computing systems
Author Affiliations +
Abstract
An optical cell switch for interconnecting massively parallel nodes offers the potential for reduction in size, power consumption, and cost of high-performance computing (HPC) interconnects. We designed an architecture based on a broadcast and select approach that is highly flexible in terms of supported ports and can easily scale from a 16x16 to a 2048x2048 port switch by exploiting both wavelength multiplexing and fiber multiplexing. The optical system is designed for 40 Gb/s operation, but the full 160 Gb/s switching likely required of a commercial system can be supported by this architecture. At the core of the switch is an array of semiconductor optical amplifiers (SOAs), which provide fast switching (~1 ns), high extinction ratio (>40 dB) for cross-talk reduction, and optical gain (15 dB typical). The full optical switch consists of a 2-stage broadcast and select design for fiber select and color select, leading to a bufferless low-latency crossbar cell switch. A switch system demonstrator with 8 full optical paths has been implemented and used for performance characterization. A fast 40 Gb/s cell receiver was developed and proven to support up to 9 dB dynamic range. System demonstration measurements have shown that a raw BER of 10-15 is achievable. Optical cross-talk is negligible and does not degrade the system performance. The system design and verification experiments demonstrate that a scaleable 40 Gb/s switch for massively parallel systems is feasible and offers the potential for significant size, power consumption, and cost reduction by applying the scalability of an optical solution to a HPC system.
© (2006) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Michael Sauer, Michael Sauer, Roe Hemenway, Roe Hemenway, Richard Grzybowski, Richard Grzybowski, David Peters, David Peters, Jason Dickens, Jason Dickens, Ron Karfelt, Ron Karfelt, } "A scaleable optical interconnect for low-latency cell switching in high-performance computing systems", Proc. SPIE 6124, Optoelectronic Integrated Circuits VIII, 61240N (3 March 2006); doi: 10.1117/12.659731; https://doi.org/10.1117/12.659731
PROCEEDINGS
12 PAGES


SHARE
RELATED CONTENT


Back to Top